A. Bagheri · UN Intern
This repository presents a collection of enterprise-grade networking projects developed by me during the ** Computer Networks** course at Iran University of Science and Technology (IUST), and in parallel with real-world responsibilities as a Network Monitoring & Security Analyst at the United Nations Office in Tehran (UNODC-Iran).
These projects go far beyond typical academic labs — they reflect real operational scenarios, deep protocol understanding, troubleshooting under pressure, and pre-production validation techniques used daily in mission-critical environments.
Enterprise-scale dual-AS topology with full redundancy
- Two autonomous systems (AS 65001 & AS 65002)
- OSPF multi-area inside each AS
- eBGP peering over loopback interfaces
- Full route redistribution (OSPF ↔ BGP)
- Physical backup link (R4–R8) to trigger automatic failover
- Detailed before/after routing table & traceroute validation
Real-world relevance: Same design principles applied in UN Tehran for inter-site connectivity and disaster recovery.
Live packet capture during web browsing + large file upload (Gmail over home Wi-Fi)
- Protocol hierarchy breakdown (TLS, QUIC, HTTP/3, DNS)
- OS fingerprinting via TTL
- HTTP/1.1 vs HTTP/2 vs HTTP/3 (QUIC) usage
- TCP retransmission & packet loss identification
- RTT graphing and traffic volume metrics
- MTU & fragmentation analysis
Used in production: Same methodology applied to detect anomalies and performance bottlenecks in UN internal network.
Full dissection of lower-layer and host configuration protocols
- Complete DHCP DORA + Release process with packet-level explanation
- ARP request/reply behavior in LAN
- Windows & WSL routing table management
- NAT translation process for private-to-public internet access
Daily operational toolset at UN Tehran for client onboarding and connectivity troubleshooting.
- Cisco Packet Tracer 8.x · GNS3
- Wireshark 4.x (Statistics, TCP Stream Graphs, IO Graphs)
- Windows Server 10 + WSL2 (Ubuntu)
- Linux networking tools (
ip,ss,tcpdump) - Cisco IOS configuration (OSPF, eBGP, redistribution, route-maps)
These projects are not simulations — they are battle-tested patterns from:
- Designing resilient multi-site routing for UN agencies
- Performing live traffic forensics during security incidents
- Validating network changes before deployment in production
- Training junior analysts on protocol behavior and troubleshooting
Every configuration, capture, and analysis here has been used (or directly inspired) from real enterprise environments.
A. Bagheri
- LinkedIn: linkedin.com/in/aibgr
Open to collaboration on enterprise network design, distributed systems, traffic forensics, and performance optimization projects.
Last updated: December 02, 2025